i don't know

This is an expression for disagreeing with someone or stating a negative opinion. It's polite-sounding, and doesn't seem too forceful. You can use it when you want to disagree with someone's opinion, like in this example:

Yeah, I don't know... the privacy issue doesn't really concern me too much.

In the example above, the speaker isn't really disagreeing with her friend's opinion. But she's saying something a little negative. She's saying that she doesn't like the pants. So she states her opinion in this polite way, by beginning with "I don't know."

This phrase appears in these lessons: